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1. Chemical Composition and Enzymatic Saccharification of Poplar | |||
MENG Xin,GENG Wenhui,JIN Yongcan | |||
Forestry 13 April 2014 | |||
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Abstract:Green liquor (Na2S + Na2CO3, GL) pretreatment is an effective pathway for improving the enzymatic digestibility of lignocellulosic biomass for the production of bioethanol. In this work, GL was employed as a pretreatment to enhance the enzymatic saccharification of poplar. During pretreatment, the increase of H-factor and TTA charge resulted in enhanced delignification and increased degradation of polysaccharides. The sugar yield of enzymatic hydrolysis increased rapidly with increasing TTA charge in GL pretreatment, while the effect of different H-factors (from 400 to 800) on sugar yield was unnoticeable. The pretreated solid recovery was 75.5% at a lignin removal rate of 29.2% under optimized conditions of total titratable alkali (TTA) charge 20%, sulfidity 25%, and H-factor 400. The sugar yield of glucan, xylan, and total sugar of GL-pretreated poplar in enzymatic hydrolysis reached up to 89.9%, 65.5%, and 82.8%, respectively, at a cellulase loading of 40 FPU/g-cellulose. | |||
TO cite this article:MENG Xin,GENG Wenhui,JIN Yongcan. Chemical Composition and Enzymatic Saccharification of Poplar[J]. |
2. Effect of sample width on characteristics of flame spread across eucalyptus wood surface | |||
WU Guihong,WU Yiqiang,HU Yunchu,ZHU Xiaodan,YANG Jianming | |||
Forestry 02 July 2013 | |||
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Abstract:To study the effect of sample width on flame spread characteristics, a series of laboratory-scale experiments were conducted employing eucalyptus wood with width from 3 to 7 cm. Flame dimension, flame spread rate and mass loss rate were obtained. The relationship between these flame spread characteristics and sample width was explored. Both the dimensionless average flame height and depth vary as the -n power of sample width. With the increase of sample width, both the flame spread rate and mass loss rate first decrease and then rise. The minimum values appear when sample width measures 6 cm. | |||
TO cite this article:WU Guihong,WU Yiqiang,HU Yunchu, et al. Effect of sample width on characteristics of flame spread across eucalyptus wood surface[OL].[ 2 July 2013] http://en.paper.edu.cn/en_releasepaper/content/4547653 |
3. A rapid microwave-assisted preparation of hydroxyapatite crystals on the microcrystalline cellulose matrix in N,N-dimethylformamide solvent | |||
MA Mingguo,WANG Bo | |||
Forestry 14 August 2012 | |||
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Abstract:The purpose of this article is to introduce a rapid route for the preparation of biomaterials on the biomass-based polymer matrix. Herein, hydroxyapatite (HA) crystals dispersed in the microcrystalline cellulose matrix have been fabricated by using microcrystalline cellulose, CaCl2, and NaH2PO4 in N,N-dimethylformamide (DMF) solvent by a simple and rapid microwave-assisted method. The influences of the microwave heating times and the heating temperatures on the phases, microstructures, and morphologies of products were explored. The samples were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectrometry (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TG), and differential scanning calorimetric analysis (DSC). The thermal stability of the products was also researched. This route reported here has advantages of being simple, rapid, low-cost, and environmentally friendly. | |||
TO cite this article:MA Mingguo,WANG Bo. A rapid microwave-assisted preparation of hydroxyapatite crystals on the microcrystalline cellulose matrix in N,N-dimethylformamide solvent[OL].[14 August 2012] http://en.paper.edu.cn/en_releasepaper/content/4486823 |
4. Fabrication of superhydrophobic spherical-like α-FeOOH films on the wood surface by a hydrothermal method | |||
WANG Chengyu,WANG Shuliang,LIU Changyu,LI Jian | |||
Forestry 08 January 2012 | |||
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Abstract:The superhydrophobic spherical-like α-FeOOH films on the wood surface was obtained from ferric sulfate and urea by a hydrothermal reaction process followed by a self-assembly of Octadecyltrichlorosilane (OTS) monolayer. The microstructure, chemical state and composition of the products were observed by scanning electron microscope (SEM), X-rad diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and Energy disperse X-ray analysis (EDX). The hydrophobic property of the treated samples was described by static water contact angles (CAs) and sliding water contact angles (SA) measurement. The stability under ambient condition and durability for corrosive liquid of the surperhydrophobic samples were also investigated in this paper. An analytical characterization revealed that the spherical-like α-FeOOH films with micro-nano structure uniformly deposited on the wood surface and OTS molecules combined with α-FeOOH films. The water contact angle of the as-prepared samples reached as high as 158 and the sliding angle was about 4 . The prepared superhydrophobic wood surface still maintained the superhydrophobic property when stored under ambient condition for three months or immersed in a sodium hydroxide solution of pH 12 and a hydrochloric acid solution of pH 2 for 2 hours at room temperature. | |||
TO cite this article:WANG Chengyu,WANG Shuliang,LIU Changyu, et al. Fabrication of superhydrophobic spherical-like α-FeOOH films on the wood surface by a hydrothermal method[OL].[ 8 January 2012] http://en.paper.edu.cn/en_releasepaper/content/4460608 |
5. Non-destructive Testing of Wood Composites based on Virtual Instrument | |||
Zhu Xiaodong,Wang Fenghu,Cao Jun | |||
Forestry 01 December 2010 | |||
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Abstract:In this paper,a suit of wood-based composite nondestructive virtual instrument system based on Labview was designed. The sample of poplar Laminated Veneer Lumber was used to discuss the feasibility of the applications of virtual instrument in the wood-based composite nondestructive test. The main results are as follows: the longitudinal resonance elasticity modulus that was measured by virtual instrument can be the token of conventionality static elasticity modulus and FFT because they had prominent correlation under the level of 0.01. | |||
TO cite this article:Zhu Xiaodong,Wang Fenghu,Cao Jun. Non-destructive Testing of Wood Composites based on Virtual Instrument[OL].[ 1 December 2010] http://en.paper.edu.cn/en_releasepaper/content/4394359 |
6. NaCl salinity induced changes in water status, ion contents and photosynthetic properties of Shepherdia argentea (Pursh) Nutt. seedlings | |||
Qin Jing,He Kangning,Dong Wenyi ,Yu Yang,Han Lei,Dong Mei,Zhang Yiyuan,Zhang Dong,Tan Guodong,Wang Zanlin,Li Anchao,Guo Qianqian,Song Xiaohan | |||
Forestry 13 April 2010 | |||
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Abstract:Two-year old seedlings of Silver buffaloberry (Shepherdia argentea (Pursh) Nutt.) were exposed to NaCl salinity (0, 200, 400 and 600 mM) for 30 days. Leaf water potential (Ψw), chlorophyll contents (Chl a, b, and a+b) and K+ content decreased with an increase in salinity. Relative water content (RWC) declined significantly with 400 and 600 mM NaCl. However, salinity induced an excessive accumulation of Na+ in the leaves of plants. Light responses of photosynthesis showed that net photosynthetic rate (PN) values were continuously raised with the increase of photosynthetic photon flux density (PPFD) at all salinity levels and plants treated with 600 mM salinity suffered from photoinhibition with the lowest PN values. The reduction of PN and stomatal conductance (gs) associated with a sharp increase of intercellular CO2 concentration (Ci) in the leaves at 600 mM salt-treated plants showed that non-stomatal limitations might have prevailed over stomatal limitations under severe saline conditions, due to severe cellular dehydration, inhibited synthesis of chlorophyll and ionic imbalance and toxicity. It is concluded that S. argentea possesses high salt tolerance capacity and can be widely cultivated in salt-affected areas. | |||
TO cite this article:Qin Jing,He Kangning,Dong Wenyi , et al. NaCl salinity induced changes in water status, ion contents and photosynthetic properties of Shepherdia argentea (Pursh) Nutt. seedlings[OL].[13 April 2010] http://en.paper.edu.cn/en_releasepaper/content/41853 |
7. Technical, Environmental & Social Feasibility Analysis For Indian Forestry Sector | |||
TAKLE Shrinidhi Sunil,Jiang Zhihong | |||
Forestry 04 December 2009 | |||
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Abstract:The rapidly growing Indian economy has implications for all sectors of the economy, including forestry. The societal demands on forests are becoming more diversified and rising faster than the capacity of forests to supply them on a sustainable basis. The widening gap is one of the main causes of forest degradation and loss of forest biodiversity that is taking place on an unprecedented scale, fast eroding the very basis of the livelihood of forest璬ependent communities. The existing administrative structure and functions, planning and control system, and research and training methods are all geared toward securing a sustained supply of timber, mainly from state forest reserves. A move toward more comprehensive multiple璾se forestry would require reorientation of forestry institutions by bringing within their mandate the production of goods and environmental services, both in and outside forests. A mismatch between the changing societal demands on forests and non璫hanging forestry institutions could slow down the growth or even allow the sector to stagnate, thereby accelerating forest degradation. The themes are: The future of Indian forestry will depend on the provision of reliable data and inventories covering all aspects of the Indian forestry system. New data and inventories must be based on integrated assessments that take account of issues far beyond traditional forest璼ector analysis and map the root causes of the degradation and depletion of forest resources. These integrated assessments can then feed into an ongoing, institutionalized strategic planning process that result in integrated strategies and policies. The successful implementation of this strategic plan will require the restructuring of existing governance and institutions with respect to the forest sector. In essence, Indian forestry experts point to the need for an integrated concept for analysis, planning, and management of the Indian forest sector. | |||
TO cite this article:TAKLE Shrinidhi Sunil,Jiang Zhihong. Technical, Environmental & Social Feasibility Analysis For Indian Forestry Sector[OL].[ 4 December 2009] http://en.paper.edu.cn/en_releasepaper/content/37245 |
8. In vitro fermentation characterization of low concentration of xylooligosaccharides prepared from corncob xylan by Bifidobacterium adolescentis | |||
Zhang Junhua,Zhang XiaoPing,Yong Qiang ,Xu Yong ,Yu Shiyuan | |||
Forestry 15 January 2009 | |||
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Abstract:In vitro fermentation characterization of low concentration of XOS by Bifidobacterium adolescentis was investigated. Cell growth, decrease in pH value and formation of organic acids were presented when XOS, glucose and arabinose were used as the sole carbon source respectively. The maximal biomasses were 0.43, 0.52 and 0.16 g L-1 when B. adolescentis fermented on 3 g L-1 XOS, glucose and arabinose respectively. It was deduced that XOS had better proliferation capability of B. adolescentis than arabinose, but less than glucose. When XOS were fermentated by B. adolescentis, X2 and X3 decreased rapidly and the pH value of the medium dropped rapidly after 18 h of fermentation due to the production of organic acids. Lactic and acetic acids were the main metabolites. Our result confirmed that low concentration XOS also had good prebiotic effects including proliferation capability of B. adolescentis and acidification ability to culture media. | |||
TO cite this article:Zhang Junhua,Zhang XiaoPing,Yong Qiang , et al. In vitro fermentation characterization of low concentration of xylooligosaccharides prepared from corncob xylan by Bifidobacterium adolescentis[OL].[15 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27910 |
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